CVE-2011-4873
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedUnspecified vulnerability in the server in Certec EDV atvise before 2.1 allows remote attackers to cause a denial of service (daemon crash) via crafted requests to TCP port 4840.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceCertec EDV atvise server before version 2.1 contains an unspecified vulnerability that allows remote attackers to cause a denial of service by sending crafted requests to TCP port 4840, resulting in daemon crash.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 2.0.0.3291CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Authentication
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- Partial
AV:N/AC:L/Au:N/C:N/I:N/A:P
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify atvise server installationCheck for atvise server process or service running on the system. Look for process names containing 'atvise' or check installed programs list for Certec EDV atvise.Affected if atvise server is installed and running on the system
-
Determine installed atvise versionLocate the atvise installation directory and check version information. Common locations include C:\Program Files\atvise or /opt/atvise. Look for version files, about dialogs, or use command 'atvise -version' if available.Affected if installed version is 2.0.0.3291 or earlier, or any version below 2.1
-
Verify TCP port 4840 is listeningRun 'netstat -an | findstr 4840' on Windows or 'netstat -an | grep 4840' on Linux to check if the atvise server is listening on port 4840.Affected if port 4840 is in LISTENING state and bound to atvise
-
Assess network exposure of port 4840Check firewall rules or network configuration to determine if port 4840 is accessible from untrusted networks. Use 'netsh advfirewall firewall show rule name=all' on Windows or check iptables rules on Linux.Affected if port 4840 is exposed to network segments with untrusted or public access
You are affected if atvise server version 2.0.0.3291 or earlier is installed, the service is running, and TCP port 4840 is accessible to untrusted network attackers.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade atvise to version 2.1 or later. If immediate upgrade is not feasible, restrict network access to TCP port 4840 through firewall rules or network segmentation to prevent unauthorized remote access.
- Consultation3.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,880.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2011-4873 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2011-4873 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data